How to complete a circular shape using an array modifier?
With the help of circular array addon download here

New link for addon

Go to edit mode and with the shift select remove the top and bottom circles. Press P and select Selection

Now in the object mode select the mesh and Press Ctrl+A
and select rotation &amp; Scale press F6 and click location tick mark.

Now in the modifiers tab add 8 count and press search bar and type Circle Array and your done.